init.c revision 50fb5a69333e4eb0b5fc30fdeae54bc73243061d
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include <stdio.h> 18#include <stdlib.h> 19#include <string.h> 20#include <unistd.h> 21#include <fcntl.h> 22#include <ctype.h> 23#include <signal.h> 24#include <sys/wait.h> 25#include <sys/mount.h> 26#include <sys/stat.h> 27#include <sys/poll.h> 28#include <errno.h> 29#include <stdarg.h> 30#include <mtd/mtd-user.h> 31#include <sys/types.h> 32#include <sys/socket.h> 33#include <sys/un.h> 34 35#ifdef HAVE_SELINUX 36#include <sys/mman.h> 37#include <selinux/selinux.h> 38#include <selinux/label.h> 39#endif 40 41#include <libgen.h> 42 43#include <cutils/list.h> 44#include <cutils/sockets.h> 45#include <cutils/iosched_policy.h> 46#include <private/android_filesystem_config.h> 47#include <termios.h> 48 49#include <sys/system_properties.h> 50 51#include "devices.h" 52#include "init.h" 53#include "log.h" 54#include "property_service.h" 55#include "bootchart.h" 56#include "signal_handler.h" 57#include "keychords.h" 58#include "init_parser.h" 59#include "util.h" 60#include "ueventd.h" 61 62#ifdef HAVE_SELINUX 63struct selabel_handle *sehandle; 64#endif 65 66static int property_triggers_enabled = 0; 67 68#if BOOTCHART 69static int bootchart_count; 70#endif 71 72static char console[32]; 73static char bootmode[32]; 74static char hardware[32]; 75static unsigned revision = 0; 76static char qemu[32]; 77 78#ifdef HAVE_SELINUX 79static int selinux_enabled = 1; 80static int selinux_enforcing = 0; 81#endif 82 83static struct action *cur_action = NULL; 84static struct command *cur_command = NULL; 85static struct listnode *command_queue = NULL; 86 87void notify_service_state(const char *name, const char *state) 88{ 89 char pname[PROP_NAME_MAX]; 90 int len = strlen(name); 91 if ((len + 10) > PROP_NAME_MAX) 92 return; 93 snprintf(pname, sizeof(pname), "init.svc.%s", name); 94 property_set(pname, state); 95} 96 97static int have_console; 98static char *console_name = "/dev/console"; 99static time_t process_needs_restart; 100 101static const char *ENV[32]; 102 103/* add_environment - add "key=value" to the current environment */ 104int add_environment(const char *key, const char *val) 105{ 106 int n; 107 108 for (n = 0; n < 31; n++) { 109 if (!ENV[n]) { 110 size_t len = strlen(key) + strlen(val) + 2; 111 char *entry = malloc(len); 112 snprintf(entry, len, "%s=%s", key, val); 113 ENV[n] = entry; 114 return 0; 115 } 116 } 117 118 return 1; 119} 120 121static void zap_stdio(void) 122{ 123 int fd; 124 fd = open("/dev/null", O_RDWR); 125 dup2(fd, 0); 126 dup2(fd, 1); 127 dup2(fd, 2); 128 close(fd); 129} 130 131static void open_console() 132{ 133 int fd; 134 if ((fd = open(console_name, O_RDWR)) < 0) { 135 fd = open("/dev/null", O_RDWR); 136 } 137 ioctl(fd, TIOCSCTTY, 0); 138 dup2(fd, 0); 139 dup2(fd, 1); 140 dup2(fd, 2); 141 close(fd); 142} 143 144static void publish_socket(const char *name, int fd) 145{ 146 char key[64] = ANDROID_SOCKET_ENV_PREFIX; 147 char val[64]; 148 149 strlcpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1, 150 name, 151 sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX)); 152 snprintf(val, sizeof(val), "%d", fd); 153 add_environment(key, val); 154 155 /* make sure we don't close-on-exec */ 156 fcntl(fd, F_SETFD, 0); 157} 158 159void service_start(struct service *svc, const char *dynamic_args) 160{ 161 struct stat s; 162 pid_t pid; 163 int needs_console; 164 int n; 165#ifdef HAVE_SELINUX 166 char *scon = NULL; 167 int rc; 168#endif 169 /* starting a service removes it from the disabled or reset 170 * state and immediately takes it out of the restarting 171 * state if it was in there 172 */ 173 svc->flags &= (~(SVC_DISABLED|SVC_RESTARTING|SVC_RESET)); 174 svc->time_started = 0; 175 176 /* running processes require no additional work -- if 177 * they're in the process of exiting, we've ensured 178 * that they will immediately restart on exit, unless 179 * they are ONESHOT 180 */ 181 if (svc->flags & SVC_RUNNING) { 182 return; 183 } 184 185 needs_console = (svc->flags & SVC_CONSOLE) ? 1 : 0; 186 if (needs_console && (!have_console)) { 187 ERROR("service '%s' requires console\n", svc->name); 188 svc->flags |= SVC_DISABLED; 189 return; 190 } 191 192 if (stat(svc->args[0], &s) != 0) { 193 ERROR("cannot find '%s', disabling '%s'\n", svc->args[0], svc->name); 194 svc->flags |= SVC_DISABLED; 195 return; 196 } 197 198 if ((!(svc->flags & SVC_ONESHOT)) && dynamic_args) { 199 ERROR("service '%s' must be one-shot to use dynamic args, disabling\n", 200 svc->args[0]); 201 svc->flags |= SVC_DISABLED; 202 return; 203 } 204 205#ifdef HAVE_SELINUX 206 if (is_selinux_enabled() > 0) { 207 char *mycon = NULL, *fcon = NULL; 208 209 INFO("computing context for service '%s'\n", svc->args[0]); 210 rc = getcon(&mycon); 211 if (rc < 0) { 212 ERROR("could not get context while starting '%s'\n", svc->name); 213 return; 214 } 215 216 rc = getfilecon(svc->args[0], &fcon); 217 if (rc < 0) { 218 ERROR("could not get context while starting '%s'\n", svc->name); 219 freecon(mycon); 220 return; 221 } 222 223 rc = security_compute_create(mycon, fcon, string_to_security_class("process"), &scon); 224 freecon(mycon); 225 freecon(fcon); 226 if (rc < 0) { 227 ERROR("could not get context while starting '%s'\n", svc->name); 228 return; 229 } 230 } 231#endif 232 233 NOTICE("starting '%s'\n", svc->name); 234 235 pid = fork(); 236 237 if (pid == 0) { 238 struct socketinfo *si; 239 struct svcenvinfo *ei; 240 char tmp[32]; 241 int fd, sz; 242 243 if (properties_inited()) { 244 get_property_workspace(&fd, &sz); 245 sprintf(tmp, "%d,%d", dup(fd), sz); 246 add_environment("ANDROID_PROPERTY_WORKSPACE", tmp); 247 } 248 249 for (ei = svc->envvars; ei; ei = ei->next) 250 add_environment(ei->name, ei->value); 251 252#ifdef HAVE_SELINUX 253 setsockcreatecon(scon); 254#endif 255 256 for (si = svc->sockets; si; si = si->next) { 257 int socket_type = ( 258 !strcmp(si->type, "stream") ? SOCK_STREAM : 259 (!strcmp(si->type, "dgram") ? SOCK_DGRAM : SOCK_SEQPACKET)); 260 int s = create_socket(si->name, socket_type, 261 si->perm, si->uid, si->gid); 262 if (s >= 0) { 263 publish_socket(si->name, s); 264 } 265 } 266 267#ifdef HAVE_SELINUX 268 freecon(scon); 269 scon = NULL; 270 setsockcreatecon(NULL); 271#endif 272 273 if (svc->ioprio_class != IoSchedClass_NONE) { 274 if (android_set_ioprio(getpid(), svc->ioprio_class, svc->ioprio_pri)) { 275 ERROR("Failed to set pid %d ioprio = %d,%d: %s\n", 276 getpid(), svc->ioprio_class, svc->ioprio_pri, strerror(errno)); 277 } 278 } 279 280 if (needs_console) { 281 setsid(); 282 open_console(); 283 } else { 284 zap_stdio(); 285 } 286 287#if 0 288 for (n = 0; svc->args[n]; n++) { 289 INFO("args[%d] = '%s'\n", n, svc->args[n]); 290 } 291 for (n = 0; ENV[n]; n++) { 292 INFO("env[%d] = '%s'\n", n, ENV[n]); 293 } 294#endif 295 296 setpgid(0, getpid()); 297 298 /* as requested, set our gid, supplemental gids, and uid */ 299 if (svc->gid) { 300 if (setgid(svc->gid) != 0) { 301 ERROR("setgid failed: %s\n", strerror(errno)); 302 _exit(127); 303 } 304 } 305 if (svc->nr_supp_gids) { 306 if (setgroups(svc->nr_supp_gids, svc->supp_gids) != 0) { 307 ERROR("setgroups failed: %s\n", strerror(errno)); 308 _exit(127); 309 } 310 } 311 if (svc->uid) { 312 if (setuid(svc->uid) != 0) { 313 ERROR("setuid failed: %s\n", strerror(errno)); 314 _exit(127); 315 } 316 } 317 318#ifdef HAVE_SELINUX 319 if (svc->seclabel) { 320 if (is_selinux_enabled() > 0 && setexeccon(svc->seclabel) < 0) { 321 ERROR("cannot setexeccon('%s'): %s\n", svc->seclabel, strerror(errno)); 322 _exit(127); 323 } 324 } 325#endif 326 327 if (!dynamic_args) { 328 if (execve(svc->args[0], (char**) svc->args, (char**) ENV) < 0) { 329 ERROR("cannot execve('%s'): %s\n", svc->args[0], strerror(errno)); 330 } 331 } else { 332 char *arg_ptrs[INIT_PARSER_MAXARGS+1]; 333 int arg_idx = svc->nargs; 334 char *tmp = strdup(dynamic_args); 335 char *next = tmp; 336 char *bword; 337 338 /* Copy the static arguments */ 339 memcpy(arg_ptrs, svc->args, (svc->nargs * sizeof(char *))); 340 341 while((bword = strsep(&next, " "))) { 342 arg_ptrs[arg_idx++] = bword; 343 if (arg_idx == INIT_PARSER_MAXARGS) 344 break; 345 } 346 arg_ptrs[arg_idx] = '\0'; 347 execve(svc->args[0], (char**) arg_ptrs, (char**) ENV); 348 } 349 _exit(127); 350 } 351 352#ifdef HAVE_SELINUX 353 freecon(scon); 354#endif 355 356 if (pid < 0) { 357 ERROR("failed to start '%s'\n", svc->name); 358 svc->pid = 0; 359 return; 360 } 361 362 svc->time_started = gettime(); 363 svc->pid = pid; 364 svc->flags |= SVC_RUNNING; 365 366 if (properties_inited()) 367 notify_service_state(svc->name, "running"); 368} 369 370/* The how field should be either SVC_DISABLED or SVC_RESET */ 371static void service_stop_or_reset(struct service *svc, int how) 372{ 373 /* we are no longer running, nor should we 374 * attempt to restart 375 */ 376 svc->flags &= (~(SVC_RUNNING|SVC_RESTARTING)); 377 378 if ((how != SVC_DISABLED) && (how != SVC_RESET)) { 379 /* Hrm, an illegal flag. Default to SVC_DISABLED */ 380 how = SVC_DISABLED; 381 } 382 /* if the service has not yet started, prevent 383 * it from auto-starting with its class 384 */ 385 if (how == SVC_RESET) { 386 svc->flags |= (svc->flags & SVC_RC_DISABLED) ? SVC_DISABLED : SVC_RESET; 387 } else { 388 svc->flags |= how; 389 } 390 391 if (svc->pid) { 392 NOTICE("service '%s' is being killed\n", svc->name); 393 kill(-svc->pid, SIGKILL); 394 notify_service_state(svc->name, "stopping"); 395 } else { 396 notify_service_state(svc->name, "stopped"); 397 } 398} 399 400void service_reset(struct service *svc) 401{ 402 service_stop_or_reset(svc, SVC_RESET); 403} 404 405void service_stop(struct service *svc) 406{ 407 service_stop_or_reset(svc, SVC_DISABLED); 408} 409 410void property_changed(const char *name, const char *value) 411{ 412 if (property_triggers_enabled) 413 queue_property_triggers(name, value); 414} 415 416static void restart_service_if_needed(struct service *svc) 417{ 418 time_t next_start_time = svc->time_started + 5; 419 420 if (next_start_time <= gettime()) { 421 svc->flags &= (~SVC_RESTARTING); 422 service_start(svc, NULL); 423 return; 424 } 425 426 if ((next_start_time < process_needs_restart) || 427 (process_needs_restart == 0)) { 428 process_needs_restart = next_start_time; 429 } 430} 431 432static void restart_processes() 433{ 434 process_needs_restart = 0; 435 service_for_each_flags(SVC_RESTARTING, 436 restart_service_if_needed); 437} 438 439static void msg_start(const char *name) 440{ 441 struct service *svc; 442 char *tmp = NULL; 443 char *args = NULL; 444 445 if (!strchr(name, ':')) 446 svc = service_find_by_name(name); 447 else { 448 tmp = strdup(name); 449 args = strchr(tmp, ':'); 450 *args = '\0'; 451 args++; 452 453 svc = service_find_by_name(tmp); 454 } 455 456 if (svc) { 457 service_start(svc, args); 458 } else { 459 ERROR("no such service '%s'\n", name); 460 } 461 if (tmp) 462 free(tmp); 463} 464 465static void msg_stop(const char *name) 466{ 467 struct service *svc = service_find_by_name(name); 468 469 if (svc) { 470 service_stop(svc); 471 } else { 472 ERROR("no such service '%s'\n", name); 473 } 474} 475 476void handle_control_message(const char *msg, const char *arg) 477{ 478 if (!strcmp(msg,"start")) { 479 msg_start(arg); 480 } else if (!strcmp(msg,"stop")) { 481 msg_stop(arg); 482 } else if (!strcmp(msg,"restart")) { 483 msg_stop(arg); 484 msg_start(arg); 485 } else { 486 ERROR("unknown control msg '%s'\n", msg); 487 } 488} 489 490static struct command *get_first_command(struct action *act) 491{ 492 struct listnode *node; 493 node = list_head(&act->commands); 494 if (!node || list_empty(&act->commands)) 495 return NULL; 496 497 return node_to_item(node, struct command, clist); 498} 499 500static struct command *get_next_command(struct action *act, struct command *cmd) 501{ 502 struct listnode *node; 503 node = cmd->clist.next; 504 if (!node) 505 return NULL; 506 if (node == &act->commands) 507 return NULL; 508 509 return node_to_item(node, struct command, clist); 510} 511 512static int is_last_command(struct action *act, struct command *cmd) 513{ 514 return (list_tail(&act->commands) == &cmd->clist); 515} 516 517void execute_one_command(void) 518{ 519 int ret; 520 521 if (!cur_action || !cur_command || is_last_command(cur_action, cur_command)) { 522 cur_action = action_remove_queue_head(); 523 cur_command = NULL; 524 if (!cur_action) 525 return; 526 INFO("processing action %p (%s)\n", cur_action, cur_action->name); 527 cur_command = get_first_command(cur_action); 528 } else { 529 cur_command = get_next_command(cur_action, cur_command); 530 } 531 532 if (!cur_command) 533 return; 534 535 ret = cur_command->func(cur_command->nargs, cur_command->args); 536 INFO("command '%s' r=%d\n", cur_command->args[0], ret); 537} 538 539static int wait_for_coldboot_done_action(int nargs, char **args) 540{ 541 int ret; 542 INFO("wait for %s\n", coldboot_done); 543 ret = wait_for_file(coldboot_done, COMMAND_RETRY_TIMEOUT); 544 if (ret) 545 ERROR("Timed out waiting for %s\n", coldboot_done); 546 return ret; 547} 548 549static int keychord_init_action(int nargs, char **args) 550{ 551 keychord_init(); 552 return 0; 553} 554 555static int console_init_action(int nargs, char **args) 556{ 557 int fd; 558 char tmp[PROP_VALUE_MAX]; 559 560 if (console[0]) { 561 snprintf(tmp, sizeof(tmp), "/dev/%s", console); 562 console_name = strdup(tmp); 563 } 564 565 fd = open(console_name, O_RDWR); 566 if (fd >= 0) 567 have_console = 1; 568 close(fd); 569 570 if( load_565rle_image(INIT_IMAGE_FILE) ) { 571 fd = open("/dev/tty0", O_WRONLY); 572 if (fd >= 0) { 573 const char *msg; 574 msg = "\n" 575 "\n" 576 "\n" 577 "\n" 578 "\n" 579 "\n" 580 "\n" // console is 40 cols x 30 lines 581 "\n" 582 "\n" 583 "\n" 584 "\n" 585 "\n" 586 "\n" 587 "\n" 588 " A N D R O I D "; 589 write(fd, msg, strlen(msg)); 590 close(fd); 591 } 592 } 593 return 0; 594} 595 596static void import_kernel_nv(char *name, int for_emulator) 597{ 598 char *value = strchr(name, '='); 599 int name_len = strlen(name); 600 601 if (value == 0) return; 602 *value++ = 0; 603 if (name_len == 0) return; 604 605#ifdef HAVE_SELINUX 606 if (!strcmp(name,"enforcing")) { 607 selinux_enforcing = atoi(value); 608 } else if (!strcmp(name,"selinux")) { 609 selinux_enabled = atoi(value); 610 } 611#endif 612 613 if (for_emulator) { 614 /* in the emulator, export any kernel option with the 615 * ro.kernel. prefix */ 616 char buff[PROP_NAME_MAX]; 617 int len = snprintf( buff, sizeof(buff), "ro.kernel.%s", name ); 618 619 if (len < (int)sizeof(buff)) 620 property_set( buff, value ); 621 return; 622 } 623 624 if (!strcmp(name,"qemu")) { 625 strlcpy(qemu, value, sizeof(qemu)); 626 } else if (!strncmp(name, "androidboot.", 12) && name_len > 12) { 627 const char *boot_prop_name = name + 12; 628 char prop[PROP_NAME_MAX]; 629 int cnt; 630 631 cnt = snprintf(prop, sizeof(prop), "ro.boot.%s", boot_prop_name); 632 if (cnt < PROP_NAME_MAX) 633 property_set(prop, value); 634 } 635} 636 637static void export_kernel_boot_props(void) 638{ 639 char tmp[PROP_VALUE_MAX]; 640 const char *pval; 641 unsigned i; 642 struct { 643 const char *src_prop; 644 const char *dest_prop; 645 const char *def_val; 646 } prop_map[] = { 647 { "ro.boot.serialno", "ro.serialno", "", }, 648 { "ro.boot.mode", "ro.bootmode", "unknown", }, 649 { "ro.boot.baseband", "ro.baseband", "unknown", }, 650 { "ro.boot.carrier", "ro.carrier", "unknown", }, 651 { "ro.boot.bootloader", "ro.bootloader", "unknown", }, 652 }; 653 654 for (i = 0; i < ARRAY_SIZE(prop_map); i++) { 655 pval = property_get(prop_map[i].src_prop); 656 property_set(prop_map[i].dest_prop, pval ?: prop_map[i].def_val); 657 } 658 659 pval = property_get("ro.boot.console"); 660 if (pval) 661 strlcpy(console, pval, sizeof(console)); 662 663 /* save a copy for init's usage during boot */ 664 strlcpy(bootmode, property_get("ro.bootmode"), sizeof(bootmode)); 665 666 /* if this was given on kernel command line, override what we read 667 * before (e.g. from /proc/cpuinfo), if anything */ 668 pval = property_get("ro.boot.hardware"); 669 if (pval) 670 strlcpy(hardware, pval, sizeof(hardware)); 671 property_set("ro.hardware", hardware); 672 673 snprintf(tmp, PROP_VALUE_MAX, "%d", revision); 674 property_set("ro.revision", tmp); 675 676 /* TODO: these are obsolete. We should delete them */ 677 if (!strcmp(bootmode,"factory")) 678 property_set("ro.factorytest", "1"); 679 else if (!strcmp(bootmode,"factory2")) 680 property_set("ro.factorytest", "2"); 681 else 682 property_set("ro.factorytest", "0"); 683} 684 685static void process_kernel_cmdline(void) 686{ 687 /* don't expose the raw commandline to nonpriv processes */ 688 chmod("/proc/cmdline", 0440); 689 690 /* first pass does the common stuff, and finds if we are in qemu. 691 * second pass is only necessary for qemu to export all kernel params 692 * as props. 693 */ 694 import_kernel_cmdline(0, import_kernel_nv); 695 if (qemu[0]) 696 import_kernel_cmdline(1, import_kernel_nv); 697 698 /* now propogate the info given on command line to internal variables 699 * used by init as well as the current required properties 700 */ 701 export_kernel_boot_props(); 702} 703 704static int property_service_init_action(int nargs, char **args) 705{ 706 /* read any property files on system or data and 707 * fire up the property service. This must happen 708 * after the ro.foo properties are set above so 709 * that /data/local.prop cannot interfere with them. 710 */ 711 start_property_service(); 712 return 0; 713} 714 715static int signal_init_action(int nargs, char **args) 716{ 717 signal_init(); 718 return 0; 719} 720 721static int check_startup_action(int nargs, char **args) 722{ 723 /* make sure we actually have all the pieces we need */ 724 if ((get_property_set_fd() < 0) || 725 (get_signal_fd() < 0)) { 726 ERROR("init startup failure\n"); 727 exit(1); 728 } 729 730 /* signal that we hit this point */ 731 unlink("/dev/.booting"); 732 733 return 0; 734} 735 736static int queue_property_triggers_action(int nargs, char **args) 737{ 738 queue_all_property_triggers(); 739 /* enable property triggers */ 740 property_triggers_enabled = 1; 741 return 0; 742} 743 744#if BOOTCHART 745static int bootchart_init_action(int nargs, char **args) 746{ 747 bootchart_count = bootchart_init(); 748 if (bootchart_count < 0) { 749 ERROR("bootcharting init failure\n"); 750 } else if (bootchart_count > 0) { 751 NOTICE("bootcharting started (period=%d ms)\n", bootchart_count*BOOTCHART_POLLING_MS); 752 } else { 753 NOTICE("bootcharting ignored\n"); 754 } 755 756 return 0; 757} 758#endif 759 760#ifdef HAVE_SELINUX 761void selinux_load_policy(void) 762{ 763 const char path_prefix[] = "/sepolicy"; 764 struct selinux_opt seopts[] = { 765 { SELABEL_OPT_PATH, "/file_contexts" } 766 }; 767 char path[PATH_MAX]; 768 int fd, rc, vers; 769 struct stat sb; 770 void *map; 771 772 sehandle = NULL; 773 if (!selinux_enabled) { 774 INFO("SELinux: Disabled by command line option\n"); 775 return; 776 } 777 778 mkdir(SELINUXMNT, 0755); 779 if (mount("selinuxfs", SELINUXMNT, "selinuxfs", 0, NULL)) { 780 if (errno == ENODEV) { 781 /* SELinux not enabled in kernel */ 782 return; 783 } 784 ERROR("SELinux: Could not mount selinuxfs: %s\n", 785 strerror(errno)); 786 return; 787 } 788 set_selinuxmnt(SELINUXMNT); 789 790 vers = security_policyvers(); 791 if (vers <= 0) { 792 ERROR("SELinux: Unable to read policy version\n"); 793 return; 794 } 795 INFO("SELinux: Maximum supported policy version: %d\n", vers); 796 797 snprintf(path, sizeof(path), "%s.%d", 798 path_prefix, vers); 799 fd = open(path, O_RDONLY); 800 while (fd < 0 && errno == ENOENT && --vers) { 801 snprintf(path, sizeof(path), "%s.%d", 802 path_prefix, vers); 803 fd = open(path, O_RDONLY); 804 } 805 if (fd < 0) { 806 ERROR("SELinux: Could not open %s: %s\n", 807 path, strerror(errno)); 808 return; 809 } 810 if (fstat(fd, &sb) < 0) { 811 ERROR("SELinux: Could not stat %s: %s\n", 812 path, strerror(errno)); 813 return; 814 } 815 map = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0); 816 if (map == MAP_FAILED) { 817 ERROR("SELinux: Could not map %s: %s\n", 818 path, strerror(errno)); 819 return; 820 } 821 822 rc = security_load_policy(map, sb.st_size); 823 if (rc < 0) { 824 ERROR("SELinux: Could not load policy: %s\n", 825 strerror(errno)); 826 return; 827 } 828 829 rc = security_setenforce(selinux_enforcing); 830 if (rc < 0) { 831 ERROR("SELinux: Could not set enforcing mode to %s: %s\n", 832 selinux_enforcing ? "enforcing" : "permissive", strerror(errno)); 833 return; 834 } 835 836 munmap(map, sb.st_size); 837 close(fd); 838 INFO("SELinux: Loaded policy from %s\n", path); 839 840 sehandle = selabel_open(SELABEL_CTX_FILE, seopts, 1); 841 if (!sehandle) { 842 ERROR("SELinux: Could not load file_contexts: %s\n", 843 strerror(errno)); 844 return; 845 } 846 INFO("SELinux: Loaded file contexts from %s\n", seopts[0].value); 847 return; 848} 849#endif 850 851int main(int argc, char **argv) 852{ 853 int fd_count = 0; 854 struct pollfd ufds[4]; 855 char *tmpdev; 856 char* debuggable; 857 char tmp[32]; 858 int property_set_fd_init = 0; 859 int signal_fd_init = 0; 860 int keychord_fd_init = 0; 861 bool is_charger = false; 862 863 if (!strcmp(basename(argv[0]), "ueventd")) 864 return ueventd_main(argc, argv); 865 866 /* clear the umask */ 867 umask(0); 868 869 /* Get the basic filesystem setup we need put 870 * together in the initramdisk on / and then we'll 871 * let the rc file figure out the rest. 872 */ 873 mkdir("/dev", 0755); 874 mkdir("/proc", 0755); 875 mkdir("/sys", 0755); 876 877 mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755"); 878 mkdir("/dev/pts", 0755); 879 mkdir("/dev/socket", 0755); 880 mount("devpts", "/dev/pts", "devpts", 0, NULL); 881 mount("proc", "/proc", "proc", 0, NULL); 882 mount("sysfs", "/sys", "sysfs", 0, NULL); 883 884 /* indicate that booting is in progress to background fw loaders, etc */ 885 close(open("/dev/.booting", O_WRONLY | O_CREAT, 0000)); 886 887 /* We must have some place other than / to create the 888 * device nodes for kmsg and null, otherwise we won't 889 * be able to remount / read-only later on. 890 * Now that tmpfs is mounted on /dev, we can actually 891 * talk to the outside world. 892 */ 893 open_devnull_stdio(); 894 klog_init(); 895 property_init(); 896 897 get_hardware_name(hardware, &revision); 898 899 process_kernel_cmdline(); 900 901#ifdef HAVE_SELINUX 902 INFO("loading selinux policy\n"); 903 selinux_load_policy(); 904#endif 905 906 is_charger = !strcmp(bootmode, "charger"); 907 908 INFO("property init\n"); 909 if (!is_charger) 910 property_load_boot_defaults(); 911 912 INFO("reading config file\n"); 913 init_parse_config_file("/init.rc"); 914 915 action_for_each_trigger("early-init", action_add_queue_tail); 916 917 queue_builtin_action(wait_for_coldboot_done_action, "wait_for_coldboot_done"); 918 queue_builtin_action(keychord_init_action, "keychord_init"); 919 queue_builtin_action(console_init_action, "console_init"); 920 921 /* execute all the boot actions to get us started */ 922 action_for_each_trigger("init", action_add_queue_tail); 923 924 /* skip mounting filesystems in charger mode */ 925 if (!is_charger) { 926 action_for_each_trigger("early-fs", action_add_queue_tail); 927 action_for_each_trigger("fs", action_add_queue_tail); 928 action_for_each_trigger("post-fs", action_add_queue_tail); 929 action_for_each_trigger("post-fs-data", action_add_queue_tail); 930 } 931 932 queue_builtin_action(property_service_init_action, "property_service_init"); 933 queue_builtin_action(signal_init_action, "signal_init"); 934 queue_builtin_action(check_startup_action, "check_startup"); 935 936 if (is_charger) { 937 action_for_each_trigger("charger", action_add_queue_tail); 938 } else { 939 action_for_each_trigger("early-boot", action_add_queue_tail); 940 action_for_each_trigger("boot", action_add_queue_tail); 941 } 942 943 /* run all property triggers based on current state of the properties */ 944 queue_builtin_action(queue_property_triggers_action, "queue_property_triggers"); 945 946 947#if BOOTCHART 948 queue_builtin_action(bootchart_init_action, "bootchart_init"); 949#endif 950 951 for(;;) { 952 int nr, i, timeout = -1; 953 954 execute_one_command(); 955 restart_processes(); 956 957 if (!property_set_fd_init && get_property_set_fd() > 0) { 958 ufds[fd_count].fd = get_property_set_fd(); 959 ufds[fd_count].events = POLLIN; 960 ufds[fd_count].revents = 0; 961 fd_count++; 962 property_set_fd_init = 1; 963 } 964 if (!signal_fd_init && get_signal_fd() > 0) { 965 ufds[fd_count].fd = get_signal_fd(); 966 ufds[fd_count].events = POLLIN; 967 ufds[fd_count].revents = 0; 968 fd_count++; 969 signal_fd_init = 1; 970 } 971 if (!keychord_fd_init && get_keychord_fd() > 0) { 972 ufds[fd_count].fd = get_keychord_fd(); 973 ufds[fd_count].events = POLLIN; 974 ufds[fd_count].revents = 0; 975 fd_count++; 976 keychord_fd_init = 1; 977 } 978 979 if (process_needs_restart) { 980 timeout = (process_needs_restart - gettime()) * 1000; 981 if (timeout < 0) 982 timeout = 0; 983 } 984 985 if (!action_queue_empty() || cur_action) 986 timeout = 0; 987 988#if BOOTCHART 989 if (bootchart_count > 0) { 990 if (timeout < 0 || timeout > BOOTCHART_POLLING_MS) 991 timeout = BOOTCHART_POLLING_MS; 992 if (bootchart_step() < 0 || --bootchart_count == 0) { 993 bootchart_finish(); 994 bootchart_count = 0; 995 } 996 } 997#endif 998 999 nr = poll(ufds, fd_count, timeout); 1000 if (nr <= 0) 1001 continue; 1002 1003 for (i = 0; i < fd_count; i++) { 1004 if (ufds[i].revents == POLLIN) { 1005 if (ufds[i].fd == get_property_set_fd()) 1006 handle_property_set_fd(); 1007 else if (ufds[i].fd == get_keychord_fd()) 1008 handle_keychord(); 1009 else if (ufds[i].fd == get_signal_fd()) 1010 handle_signal(); 1011 } 1012 } 1013 } 1014 1015 return 0; 1016} 1017